In reply to Chris:
I don't personally organise competitions, although I live with Tim McMahon who organises all of the competitions over here, and I have worked with him a fair bit in his preparations for most of the competitions, and on the day of the competition I am always the person who takes control and manages everything, organising helpers, getting the next event running, etc. etc.
I am for the removal of magic and master magic. Mainly my reason is that I believe the events are stupid and pointless. I don't see any need to bring up more specific reasons, as they've all been said before. But from the perspective of an organiser, there are several reasons why magics become a hinderance. Firstly, there is the extra time taken to print and write up scorecards for bulks of people. Secondly, there is the expense of printing off extra certificates, and possibly also prizes. Thirdly, there is the time they waste at competitions. Even though you can simply ask people to pair up and go, this tends to be a process that ends up being drawn out way further than necessary, with people playing around, taking too long to warm up (despite me always giving clear instructions that there will be no warm ups), and magics breaking. Fourthly, there is the problem with accurate judging, which has already been mentioned; it's so difficult to judge magic, and I can almost guarantee that there have been so many magic solves performed in Australia that should have received penalties but didn't due to the difficulty of judging the event and me or Tim not being informed of discretions. Fifthly, in the case where magics are not held (I should point out that I always object to the inclusion of magics in our competitions) there is usually a group of people that harrass the organisers to hold it, which is rather annoying (this harrassment actually seems to have disappeared from Australian competitions, or at least to my awareness, I guess because people have given up on my stubbornness, woot).
To conclude: magic and master magic are both stupid events that cause a hinderance to organisers.